A woman in Texas was shot and killed in a PetSmart parking lot after an argument over not saying “thank you” for opening the door, according to police.

Cecilia Simpson, 41, was shot several times outside a PetSmart in Dallas on Tuesday at around 1 p.m., Dallas police told FOX 4.

A witness told police that Simpson held the door open for Keona Zachyua Hampton, 22, at a Five Below store, an arrest affidavit states.

Simpson allegedly became irritated that Hampton didn’t thank her for holding the door open, triggering an argument. Simpson and her daughter went to their car and drove to PetSmart, which was in the same plaza.

When Simpson and her daughter entered the PetSmart store, she told employees they were being followed by Hampton.

Hampton allegedly walked into the store and began arg

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